Mohammed M. Ahwidi

Sebha University, Libya, Sebha · Department of Chemistry

Carbon-free electrosynthesis of ammonia using water (H 2 source) and air (N 2 source) is promising technology to reduce the global CO 2 emission resulting from the industrial ammonia production process (Haber-Bosch). In this study, electrocatalysis activity of non-noble metal perovskite-based catalyst (La 0.75 Sr 0.25 Cr 0.5 Fe 0.5 O 3- δ -Ce 0.8 G...

Purpose This paper aims to investigate the electrocatalytic activity of CoFe1.9Mo0.1O4-Ce0.8Gd0.18Ca0.02O2-δ composite (CFMo-CGDC) for the direct synthesis of ammonia from H2O and N2 under atmospheric pressure. Designs CoFe1.9Mo0.1O4 nanoparticles (CFMo NPs) were synthesized via a sol-gel method. CFMo NPs were characterized using X-ray diffracti...

The electrocatalytic ammonia synthesis using water (along with nitrogen) as a hydrogen source is proposed as an alternative green and clean technology to the energy-intensive and CO2-emitting process (Haber-Bosch) for ammonia production. Besides, a selective electrocatalyst for ammonia synthesis versus the competing hydrogen evolution remains elusi...

In this study, Zn-substituted cobalt ferrite nanoparticles (CoFe1.9Zn0.1O4, CFZ) were successfully synthesized via a combined EDTA-citrate sol-gel process. The synthesized CoFe1.9Zn0.1O4 nanoparticles were characterized by X-ray powder diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), point zero charge (pHpzc) and scanning electron...

In this study, photocatalytic activity of Ca-doped ceria (CDC) for malachite green (MG) degradation was investigated. CDC was successfully synthesized via co-precipitation method using ammonium oxalate as a precipitating agent. CDC was characterized using Fourier transform infrared spectroscopy (FTIR), powder X-ray diffraction (XRD), UV-Vis spectro...

Highlights  Nano treatment is used to cure a number of cancer cases, which have shown significantly to fight cancer.  Nanodevices become one of the greatest medical healthcare sittings named, as nanoparticles (NPs) are Quantum dots (QDs), Nanogold shell (AuNPs), Dendrimers, Nanopore, and Nanotubes.  Nanodevices provide potential benefits for dia...

In this study, the adsorption properties of spinel ferrite-based adsorbent, CoFe1.9Mo0.1O4 (CFMo), for removal of methylene blue (MB) from aqueous solution have been investigated. Sol-gel process was successfully employed to prepare CoFe1.9Mo0.1O4 magnetic nanoparticles. The synthesized adsorbent was characterized by Fourier transform infrared (FTI...

In this paper, the ionic conductivity of a nanocomposite electrolyte composed of calcium and samarium co-doped ceria (CSDC) and ternary carbonate was investigated. Calcium and samarium co-doped ceria (Ce0.8Sm0.18Ca0.02O2-δ) was synthesised via sol-gel process. A nanocomposite electrolyte was prepared by mixing CSDC with ternary carbonate at a weigh...

In this study, the effect of sintering temperature on the proton-and oxygen-ion conductivities of a nanocomposite electrolyte based on Ca-doped ceria/carbonate was investigated. Ca-doped ceria (CDC) nanoparticles were successfully synthesised using a sol-gel process. Ternary carbonate eutectic salt ((Li/Na/K)2CO3) was prepared by solid-state reacti...

In this paper, two-phase composite electrolyte composed of cerium oxide (CeO2) and ternary carbonate (Li/Na/K)2CO3) has been prepared by solid-state reaction. The structure and the thermal stability of CeO2-ternary carbonate (80:20 wt%) composite were characterised by X-ray powder diffraction (XRD) and simultaneous thermal analysis (STA), respectiv...

The ionic conductivity of Ca-doped ceria (CDC)-carbonate nanocomposite electrolyte was investigated. CDC powder with a composition of (Ce0.8Ca0.2O2-δ) was synthesised via a co-precipitation method and used as the host phase. Ternary carbonate eutectic salt ((Li/Na/K)2CO3) was prepared by solid state reaction and selected as the second phase. The CD...

In this paper, the ionic conductivity of Gd-doped ceria-carbonate nanocomposite electrolyte was investigated. Gd-doped ceria (GDC) powder with a composition of (Ce0.8Gd0.2O2-δ) was synthesised via a combined EDTA-citrate complexing sol-gel process. A composite electrolyte was prepared by mixing GDC with the ternary carbonate ((Li/Na/K)2CO3) at weig...